Answer:
The correct answer will be-neural activity in the brain.
Explanation:
Consciousness in humans depends upon the activity of the brain when the first-order state about the world is perceived.
The neural activity includes controlling the synaptic junctions, regulations of the synaptic vesicles, neurotransmitter receptors and cytoplasmic signalling molecules.
Studies indicated that neuronal activity changes in the frontal and temporal lobe before a change in the perception is observed and reported. These changes are correlated with the perception and the emergence of the conscious precept of the perception.
Thus, neural activity is the correct answer.